Also note that the typical "scan line" that is present in any photo you take of a monitor is not involved here as it is higher up on the screen at the point this photo was taken.

DISCLAIMER: This flickering effect is isolated to just this graph control in UT2K3Bench. Rtyr and I have not noticed flickering anywhere else in Windows or in any games with these four cards. This leads me to believe that the problem may be tied to the graph control (possible refresh bug with graph control or something) itself and actually have nothing to do with the cards. To determine this for sure I have e-mailed the author of UT2K3Bench and requested his insight. I'll post here if/when he responds with his comments.